Inorganic Chemistry PYQ — Page 14

The coordination geometry around the manganese in decacarbonyldimanganese$(0)$

Match List I with List II \(\begin{array}{|l|l|l|l|} \hline & \text{List-I} & & \text{List-II} \\ \hline & \text{(Molecule)} & & \text{(Shape)} \\ \hline \text { A. } & \mathrm{NH}_3 & \text { I. } & \text { Square pyramid } \\ \hline \text { B. } & \mathrm{BrF}_5 & \text { II. } & \text { Tetrahedral } \\ \hline \text { C. } & \mathrm{PCl}_5 & \text { III. } & \text { Trigonal pyramidal } \\ \hline \text { D. } & \mathrm{CH}_4 & \text { IV. } & \text { Trigonal bipyramidal } \\ \hline \end{array}\) Choose the correct answer from the options given below:

Consider the following complex ions $P=[{\mathrm{FeF}}_{6}{]}^{3–}$, $Q=[V({H}_{2}O){}_{6}{]}^{2+}$, $R=[\mathrm{Fe}({H}_{2}O{)}_{6}{]}^{2+}$ The correct order of the complex ions, according to their spin only magnetic moment values (in B.M.) is :

Match List I with List II \(\begin{array}{|l|l|l|l|} \hline & \text{List - I} & & \text{List - II} \\ & \text{(Compound/Species)} & & \text{(Shape/Geometry)} \\ \hline \text { A. } & \mathrm{SF}_4 & \text { I. } & \text { Tetrahedral } \\ \hline \text { B. } & \mathrm{BrF}_3 & \text { II. } & \text { Pyramidal } \\ \hline \text { C. } & \mathrm{BrO}_3^{-} & \text {III. } & \text { See saw } \\ \hline \text { D. } & \mathrm{NH}_4^{+}{ }^{+} \mathrm{KS} & \text { IV. } & \text { Bent T-Shape } \\ \hline \end{array}\) Choose the correct answer from the options given below:

Given below are two statements: Statement - I: Along the period, the chemical reactivity of the element gradually increases from group $1$ to group $18$ . Statement - II: The nature of oxides formed by group $1$ element is basic while that of group $17$ elements is acidic. In the the light above statements, choose the most appropriate from the questions given below:

Given below are two statements : Statement I : The metallic radius of \(\mathrm{Na}\) is \(1.86 \mathrm{~A}^{\circ}\) and the ionic radius of \(\mathrm{Na}^{+}\)is lesser than \(1.86 \mathrm{~A}^{\circ}\). Statement II : Ions are always smaller in size than the corresponding elements. In the light of the above statements, choose the correct answer from the options given below :

Given below are two statements : Statement I : The electronegativity of group $14$ elements from $\mathrm{Si}$ to $\mathrm{Pb}$ gradually decreases. Statement II : Group $14$ contains non-metallic, metallic, as well as metalloid elements. In the light of the above statements, choose the most appropriate from the options given below :

The metal atom present in the complex MABXL (where A, B, X and L are unidentate ligands and \(\mathrm{M}\) is metal) involves \(\mathrm{sp}^3\) hybridization. The number of geometrical isomers exhibited by the complex is:

The 'spin only' magnetic moment value of \(\mathrm{MO}_4{ }^{2-}\) is _______ BM. (Where M is a metal having least metallic radii. among \(\mathrm{Sc}, \mathrm{Ti}, \mathrm{V}, \mathrm{Cr}, \mathrm{Mn}\) and \(\mathrm{Zn}\) ). (Given atomic number: \(\mathrm{Sc}=21, \mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Cr}=24, \mathrm{Mn}=25\) and \(\mathrm{Zn}=30\))

Among \(\mathrm{CrO}, \mathrm{Cr}_2 \mathrm{O}_3\) and \(\mathrm{CrO}_3\), the sum of spin-only magnetic moment values of basic and amphoteric oxides is _______ \(10^{-2} \mathrm{BM}\) (nearest integer). (Given atomic number of \(\mathrm{Cr}\) is 24)

A first row transition metal with highest enthalpy of atomisation, upon reaction with oxygen at high temperature forms oxides of formula \(\mathrm{M}_2 \mathrm{O}_{\mathrm{n}}\) (where \(\mathrm{n}=3,4\), 5). The 'spin-only' magnetic moment value of the amphoteric oxide from the above oxides is ______ \(\mathrm{BM}\) (near integer) (Given atomic number: \(\mathrm{Sc}: 21, \mathrm{Ti}: 22, \mathrm{~V}: 23, \mathrm{Cr}: 24, \mathrm{Mn}: 25, \mathrm{Fe}: 26, \mathrm{Co}: 27\), \(\mathrm{Ni}: 28, \mathrm{Cu}: 29, \mathrm{Zn}: 30\))

A first row transition metal in its +2 oxidation state has a spin-only magnetic moment value of \(3.86 \mathrm{BM}\). The atomic number of the metal is

Identify correct statements from below: A. The chromate ion is square planar. B. Dichromates are generally prepared from chromates. C. The green manganate ion is diamagnetic. D. Dark green coloured ${K}_{2}{\mathrm{MnO}}_{4}$ disproportionates in a neutral or acidic medium to give permanganate. E. With increasing oxidation number of transition metal, ionic character of the oxides decreases. Choose the correct answer from the options given below:

Given below are two statements : Statement (I) : The 4f and 5f - series of elements are placed separately in the Periodic table to preserve the principle of classification. Statement (II) : s-block elements can be found in pure form in nature. In light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements : Statement (I) : Both metal and non-metal exist in $\mathrm{p}$ and d-block elements. Statement (II) : Non-metals have higher ionisation enthalpy and higher electronegativity than the metals. In the light of the above statements, choose the most appropriate answer from the option given below:

Given below are two statements: Statement (I) : ${\mathrm{SiO}}_{2}$ and ${\mathrm{GeO}}_{2}$ are acidic while $\mathrm{SnO}$ and $\mathrm{PbO}$ are amphoteric in nature. Statement (II) : Allotropic forms of carbon are due to property of catenation and $p\pi -d\pi$ bond formation. In the light of the above statements, choose the most appropriate answer from the options given below:

Oxidation state of Fe(Iron) in complex formed in Brown ring test.

Given below are two statements : one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$. Assertion (A) : Melting point of Boron $(2453K)$ is unusually high in group $13$ elements. Reason (R) : Solid Boron has very strong crystalline lattice. In the light of the above statements, choose the most appropriate answer from the options given below ;

Element not showing variable oxidation state is :

Number of molecules from the following which are exceptions to octet rule is ______ \(\mathrm{CO}_2, \mathrm{NO}_2, \mathrm{H}_2 \mathrm{SO}_4, \mathrm{BF}_3, \mathrm{CH}_4, \mathrm{SiF}_4, \mathrm{ClO}_2, \mathrm{PCl}_5, \mathrm{BeF}_2, \mathrm{C}_2 \mathrm{H}_6, \mathrm{CHCl}_3, \mathrm{CBr}_4\)

The transition metal having highest ${3}^{\mathrm{rd}}$ ionisation enthalpy is:

Given below are two statements : one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$ Assertion $(A)$ : In aqueous solutions ${\mathrm{Cr}}^{2+}$ is reducing while ${\mathrm{Mn}}^{3+}$ is oxidising in nature. Reason $(R):$ Extra stability to half filled electronic configuration is observed than incompletely filled electronic configuration. In the light of the above statement, choose the most appropriate answer from the options given below:

Match List I with List II \(\begin{array}{|l|l|l|l|} \hline & \text{List - I} & & \text{List - II} \\ & \text{(Compound)} & & \text{(Uses)} \\ \hline \text { A. } & \text { Iodoform } & \text { I. } & \text { Fire extinguisher } \\ \hline \text { B. } & \text { Carbon tetrachloride } & \text { II. } & \text { Insecticide } \\ \hline \text { C. } & \text { CFC } & \text { III. } & \text { Antiseptic } \\ \hline \text { D. } & \text { DDT } & \text { IV. } & \text { Refrigerants } \\ \hline \end{array}\) Choose the correct answer from the options given below:

The molecule/ion with square pyramidal shape is: